C / C++ / MFC

GradientFillRect(HDC (wParam), &thisWindowRect, startCol, endCol, TRUE);

case WM_ERASEBKGND:
{
	GetClientRect(hWnd, &thisWindowRect);
	COLORREF startCol = RGB(174, 255, 194), endCol = RGB(230, 255, 236);
	GradientFillRect(HDC (wParam), &thisWindowRect, startCol, endCol, TRUE);

}

BOOL bLoadLib = FALSE;
HMODULE _user32 = GetModuleHandle("user32.dll");
if(_user32 ==  INVALID_HANDLE_VALUE || _user32 == NULL)
{
	_user32 = LoadLibrary("User32.dll");
	if(_user32)
	bLoadLib = TRUE;
}

typedef BOOL (WINAPI *_AnimateWindowDT) (HWND,DWORD,DWORD);
_AnimateWindowDT _AnimateWindow;
			    
if(_user32)
{
	// For Win98,Win2000 and above. 
	if((_AnimateWindow = (_AnimateWindowDT) GetProcAddress(_user32,"AnimateWindow")))
	{
        	RECT windozeRect, thisWindowRect, SlideDialog;
		int DialogLeft, DialogRight;
		SystemParametersInfo(SPI_GETWORKAREA, 0, &windozeRect, 0);
		GetWindowRect(hWnd,&thisWindowRect);
		DialogLeft = thisWindowRect.right;
		DialogRight = thisWindowRect.bottom;

		thisWindowRect.left = windozeRect.right - DialogLeft - 8;
		thisWindowRect.top = windozeRect.bottom - DialogRight- 5;

		SetWindowPos(hWnd, NULL,thisWindowRect.left, thisWindowRect.top, 0, 0, SWP_NOSIZE);
					
		_AnimateWindow(hWnd, 300, AW_SLIDE |  AW_VER_NEGATIVE);
		bBack = TRUE;
	}
	else
	{
	        //If in any case AnimateWindow crash or don't respond.
		//For Win95,Win NT which doesn't support AnimateWindow(). 

		RECT windozeRect, thisWindowRect, SlideDialog;
		int DialogLeft, DialogRight;
		SystemParametersInfo(SPI_GETWORKAREA, 0, &windozeRect, 0);
		GetWindowRect(hWnd,&thisWindowRect);
		DialogLeft = thisWindowRect.right;
		DialogRight = thisWindowRect.bottom;

		thisWindowRect.left = windozeRect.right - DialogLeft - 8;
		thisWindowRect.top = windozeRect.bottom + 5;
		SlideDialog.top = thisWindowRect.top;


		SetWindowPos(hWnd, NULL,thisWindowRect.left, thisWindowRect.top, 0, 0, SWP_NOSIZE );
							
		for(;thisWindowRect.top > SlideDialog.top - 131; thisWindowRect.top--)
		{
			UpdateWindow(hWnd);
			SetWindowPos(hWnd, NULL,thisWindowRect.left, thisWindowRect.top, 0, 0, SWP_NOSIZE);
			ShowWindow(hWnd, SW_SHOW);
			Sleep(2);
		}
		bBack = TRUE;
	}				
}

void GradientFillRect(HDC hdc, LPRECT rcGradient, COLORREF start, COLORREF end, BOOL isVertical)
{
	BYTE startRed = GetRValue(start);
	BYTE startGreen = GetGValue(start);
	BYTE startBlue = GetBValue(start);

	BYTE endRed = GetRValue(end);
	BYTE endGreen = GetGValue(end);
	BYTE endBlue = GetBValue(end);

	HBRUSH endColor = CreateSolidBrush(end);
	FillRect(hdc, rcGradient, endColor);
	DeleteObject(endColor);
	
	//Gradient line width/height
	int dy = 1;

	int length = (isVertical ? rcGradient->bottom - rcGradient->top : rcGradient->right - rcGradient->left) - dy;

	for (int dn = 0; dn <= length; dn += dy)
	{
		BYTE currentRed = (BYTE)MulDiv(endRed-startRed, dn, length) + startRed;
		BYTE currentGreen = (BYTE)MulDiv(endGreen-startGreen, dn, length) + startGreen;
		BYTE currentBlue = (BYTE)MulDiv(endBlue-startBlue, dn, length) + startBlue;

		RECT currentRect = {0};
		if (isVertical)
		{
			currentRect.left = rcGradient->left;
			currentRect.top = rcGradient->top + dn;
			currentRect.right = currentRect.left + rcGradient->right - rcGradient->left;
			currentRect.bottom = currentRect.top + dy;

		}
		else
		{
			currentRect.left = rcGradient->left + dn;
			currentRect.top = rcGradient->top;
			currentRect.right = currentRect.left + dy;
			currentRect.bottom = currentRect.top + rcGradient->bottom - rcGradient->top;
		}

		HBRUSH currentColor = CreateSolidBrush(RGB(currentRed, currentGreen, currentBlue));
		FillRect(hdc, ¤tRect, currentColor);
		DeleteObject(currentColor);
	}
}

case WM_ERASEBKGND:
{
	GetClientRect(hWnd, &thisWindowRect);

	COLORREF startCol = RGB(174, 255, 194), endCol = RGB(230, 255, 236);
	GradientFillRect(HDC (wParam), &thisWindowRect, startCol, endCol, TRUE);

// indicate that WM_ERASEBKGND was handled
	return TRUE;                           				
}

gothic_coder wrote:

Is it working well in your system?? No Black Border????

case WM_CTLCOLORSTATIC:
{
        if(hwndstatic == GetDlgItem(hWnd, IDC_STATIC_TEXT)
        {
	 HBRUSH hbr;
	 SetBkMode((HDC)wParam, TRANSPARENT);
	 hbr=(HBRUSH)GetStockObject(NULL_BRUSH);
	 return (LONG)hbr;
        }
}

int CALLBACK AnimateWindow(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
{
 switch(Msg)
 {
  case WM_INITDIALOG:
   ....
   ....
   break;

  default:
   return FALSE;
 }
 return TRUE;
}