Topics by cambalinho

these is the VB6 function for RayCasting: Private Sub DrawRays() Dim StepX As Double Dim StepY As Double Dim VertX As Double Dim VertY As Double Dim HorizX As Double Dim HorizY As Double Dim MapX As Long Dim MapY As Long Dim HorizDist As Double Dim VertDist As Double …

heres a sample of using pointers on VB6: Option Explicit Private Const BI_RGB = 0 Private Const CBM_INIT = &H4 Private Const DIB_RGB_COLORS = 0 Private Const USE_BITMAP_ALPHA = &H1000000 Private Type BITMAPINFOHEADER biSize As Long biWidth As Long biHeight As Long biPlanes As Integer biBitCount As Integer biCompression As …

i know save the Image on IStream. but what isn't saved like the original: the backcolor goes to black instead stays white. i belive that the problem is the transparent color, because isn't saved on IStream. i had tryied use the ColorPalette(Image.GetPalette() and Image.SetPalette(), but the ColorPalette.Count it's zero), but …

i did a class for the timer precision using the timeSetEvent(). of course i can have more than 7 instances from the Timer class(with 200ms or something so small). is these a limitation or what? class Timer { private: static unsigned int TimerCount; UINT_PTR timerid; UINT m_uResolution=0; unsigned int TimerID=0; …

i'm getting problems, again, on how i get the frame delay on gif files using Image class: UINT TotalBuffer = img2.GetPropertyItemSize(PropertyTagFrameDelay); //img2 = (PropertyItem*)malloc(TotalBuffer);//my compiler gives an error img2.GetPropertyItem(PropertyTagFrameDelay,TotalBuffer,&img2); framedelay=TotalBuffer; seems that the GDIPLUS can be a litte diferent from compiler to compiler :( so how can i get the …

can i add 1 item on standard System Menu? (my big objective is just add 1 item for put the window allways on top)

i have my own region class: class region { private: BYTE* Get24BitPixels(HBITMAP pBitmap, WORD *pwWidth, WORD *pwHeight) { // a bitmap object just to get bitmap width and height BITMAP bmpBmp; // pointer to original bitmap info LPBITMAPINFO pbmiInfo; // bitmap info will hold the new 24bit bitmap info BITMAPINFO …

my Region bitmap way uses the CreateRectRgn() and CombineRgn() functions. my question is: is more faster use the CreatePolygonRgn() with POINT array object?

why WS_CLIPCHILDREN style don't let the child control been clear? the WS_CLIPCHILDREN style avoid the flickers. but don't let clear the control :( why i can't clear the control(before WM_PAINT message)?

the control have the WS_TRANSPARENT style. and: case WM_ERASEBKGND: { return TRUE; } break; case WM_CTLCOLORSTATIC: { return (LRESULT)GetStockObject(NULL_BRUSH); } break; case WM_DRAWITEM: { DRAWITEMSTRUCT *test=(DRAWITEMSTRUCT*) lParam; image imglabel(test->rcItem.right-test->rcItem.left,test->rcItem.bottom-test->rcItem.top); if(inst->blnTransparent!=true) FillRect(test->hDC,&test->rcItem, CreateSolidBrush(inst->clrBackColor)); else FillRect(test->hDC,&test->rcItem,(HBRUSH) GetStockObject(NULL_BRUSH)); FillRect(imglabel,&test->rcItem,CreateSolidBrush(inst->clrBackColor)); if(inst->imgtest.haveimage()) DrawHICONtoHDC(imglabel, inst->imgtest,1,1); SetBkMode(imglabel,TRANSPARENT); char *text=(char*)inst->strCaption.c_str(); SetTextColor(imglabel,inst->clrTextColor ); DrawTextEx(imglabel,text,-1,&test->rcItem,DT_LEFT,NULL); if(inst->blnBorder==true) DrawEdge(imglabel, &test->rcItem,BDR_SUNKENINNER | BDR_RAISEDOUTER,BF_RECT); …

by several reasons, i must create the static with it's paint message: case WM_PAINT: { PAINTSTRUCT ps; HDC hdc = BeginPaint(inst->hwnd, &ps); if(inst->Paint==NULL) { RECT f; GetClientRect(hwnd,&f); HBRUSH s=CreateSolidBrush(inst->clrBackColor); SelectObject(hdc,(HBRUSH)s); if (inst->clrBackColor==-1) { //hide, copy the parent control and show the control again ShowWindow(inst->hwnd,SW_HIDE); BitBlt(hdc,0,0,f.right-f.left,f.bottom-f.top,GetDC(GetParent(inst->hwnd)),inst->intLeft,inst->intTop,SRCCOPY); ShowWindow(inst->hwnd,SW_SHOW); } else FillRect(hdc,&f,s); SetBkMode(hdc,TRANSPARENT); …

from reading these site: http://www.catch22.net/tuts/flicker-free-drawing i understand that i must avoid the pixel been changed more than once and a double-buffer: //how avoid the pixel be changed more than once: case WM_ERASEBKGND: return 1; //for other controls, we must use another messsage(see the child control messages) and heres how we …

using the WM_KEYUP message: how can i combine the keys? if(wParam== VK_CONTROL & 'a') MessageBox(NULL,"hi", "hi",MB_OK); if i click on control key, the message is showed.... but my combination key is ctrl+a.... so how can i combine the keys? :(

when i use the ownerdraw message, with button(for exemple), do i lose the button face or only the text? (i need show a text and image, without lose the button face)

i'm using the data control with mask edit box control. when i click on next button, the mask edit box isn't updated. but why show us the 1st element from data?

i'm learning, by work, how use win32 forms applications. but i'm geting a problem: the label(STATIC class) is give me flickers :( i had tryied use the WS_EX_COMPOSITED but give me problems with WM_MOUSEMOVE message :( someone tell me something about double-buffering, but i only knows use it for images …

i did an Empty project(bored... only problems :( ). but can i add a manifest file to exe or the project?

i know use the some functions for put an image on window: void setImage(string FileName) { HBITMAP hImage =(HBITMAP) LoadImage(NULL,FileName.c_str(),IMAGE_BITMAP,20,20,LR_LOADFROMFILE); HDC image = CreateCompatibleDC(NULL); SelectObject(image,hImage); BITMAP bitmap; GetObject(hImage,sizeof(BITMAP),&bitmap); BitBlt(GetDC(this->hwnd),0,0,bitmap.bmWidth,bitmap.bmHeight,image,0,0,SRCCOPY); } but i get 2 problems: 1 - the image isn't showed with original size :( ; 2 - after 2 …